Clarence Jackson Smith

US Patent:

40391272, Aug 2, 1977

Filed:

Feb 9, 1976

Appl. No.:

5/656510

Inventors:

Donald F. Huffhines - Richardson TX
J. S. Jones - Valley View TX
Clarence G. Smith - Irving TX

Assignee:

Mobil Oil Corporation - New York NY

International Classification:

G01D 1524

US Classification:

346110R

Abstract:

An apparatus for plotting information, e. g. , seismic data, onto a continuous sheet of a recording medium, e. g. , photographic film. The film travels from a supply reel, over an advance roller, across a flat exposure surface, and onto a takeup roller. Torque motors apply equal but opposite torques to the supply reel and the takeup reel to maintain the film in tension to insure that the film will lie flat on the exposure surface during the plotting operation. A stepping motor rotates advance roller to move the film a precise amount across the exposure surface at desired times during the plotting operation. A camera, e. g. , cathode ray tube, which receives data and projects it onto the film on the exposure surface, is mounted on a carriage which is swept back and forth across the exposure surface by means of a lead screw driven by a precision stepping motor. Control circuitry means is provided which not only drives the stepping motor and, hence, the carriage at a constant, defined speed during the plotting portion of a sweep but also provides for the proper acceleration and deceleration of the motor during each sweep of the carriage.

US Patent:

41930584, Mar 11, 1980

Filed:

Jan 25, 1978

Appl. No.:

5/872271

Inventors:

Clarence G. Smith - Irving TX

Assignee:

Mobil Oil Corporation - New York NY

International Classification:

G01V 134
G01D 100

US Classification:

367 71

Abstract:

Multiplexed seismic data representing a plurality of seismic channels intensity modulates each sweep of the electron beam of a cathode-ray tube. Each successive sweep of the electron beam is photographically reproduced on a rotating drum plotter to provide a seismic record section. The sweep signal for controlling the electron beam is automatically gain controlled so that the number of seismic traces per inch remains constant.

US Patent:

42098556, Jun 24, 1980

Filed:

Nov 25, 1977

Appl. No.:

5/854564

Inventors:

Clarence G. Smith - Irving TX

Assignee:

Mobil Oil Corporation - New York NY

International Classification:

G01V 134

US Classification:

367 71

Abstract:

Multiplexed seismic data representing a plurality of seismic channels intensity modulates each sweep of the electron beam of a cathode-ray tube. Each successive sweep of the electron beam is photographically reproduced on a rotating drum plotter to provide a seismic record section. The modulation of the cathode-ray tube is further controlled to provide for various seismic trace presentations on the record section, including wiggle traces, variable area traces, wiggle-variable area traces, and symmetrical-variable area traces.